{
    "_meta": {
        "supplier": "Sulzer ABS",
        "type": "Disc",
        "model": "PIK300",
        "membrane": "Perforated EPDM",
        "membraneArea_m2_per_element": 0.07,
        "membraneArea_m2_per_element_note": "Sulzer ABS PIK/PRK 300 mm fine-bubble disc, ~295 mm active membrane diameter (π × 0.1475² ≈ 0.068 m², rounded to 0.07 m²). Confirm against Sulzer spec sheet if available.",
        "stdAir": { "temp_C": 0, "pressure_mbar": 1013.25, "RH_pct": 0 },
        "coverageBasis": "bottom-coverage-pct",
        "coverageReference": [5, 10, 15, 20, 25],
        "dataQuality": "multi-coverage",
        "xAxisBasis": "per-m2-membrane-Nm3h",
        "yAxisBasis": "ssotr-g-per-Nm3-per-m",
        "waterDepth_m": 4.0,
        "source": "'PIK & PRK300 data from QM.xlsx' (Sheet1). Sister model PRK300 shares the SOTE/SSOTR curves; only DWP differs (PIK300 = perforated EPDM, PRK300 = perforated PUR).",
        "note": "Native data was Sm³/h/disc on X and g O₂/(Sm³·m) on Y (US standard, 20 °C, 1.204 kg/Sm³ → 278.6 g O₂/Sm³). Converted to canonical Nm³ basis (DIN-1343, 0 °C, 1.293 kg/Nm³ → 299.0 g O₂/Nm³): X × 0.9319 / 0.07, Y × 1.0732. Water depth ≈ 4.0 m falls out of the SOTE↔SSOTR ratio under Sm³ conventions — verify if precision matters."
    },
    "sote_curve": {
        "5":  { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [27.87, 26.99, 25.80, 24.97, 24.38, 23.89, 23.46, 23.12] },
        "10": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [30.18, 29.33, 28.15, 27.33, 26.73, 26.21, 25.83, 25.49] },
        "15": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [31.51, 30.53, 29.16, 28.27, 27.57, 27.01, 26.55, 26.15] },
        "20": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [32.52, 31.39, 29.88, 28.84, 28.06, 27.45, 26.92, 26.49] },
        "25": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [33.26, 32.04, 30.39, 29.27, 28.45, 27.77, 27.22, 26.76] }
    },
    "otr_curve": {
        "5":  { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [20.937, 20.276, 19.382, 18.759, 18.316, 17.947, 17.624, 17.369] },
        "10": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [22.673, 22.034, 21.148, 20.532, 20.081, 19.690, 19.405, 19.149] },
        "15": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [23.672, 22.936, 21.907, 21.238, 20.712, 20.291, 19.946, 19.645] },
        "20": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [24.431, 23.582, 22.447, 21.666, 21.080, 20.622, 20.224, 19.901] },
        "25": { "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49], "y": [24.987, 24.070, 22.831, 21.989, 21.373, 20.862, 20.449, 20.104] }
    },
    "p_curve": {
        "0": {
            "x": [19.97, 26.62, 39.93, 53.24, 66.56, 79.87, 93.18, 106.49],
            "y": [25.5,  26.0,  27.5,  30.3,  34.0,  39.0,  45.0,  52.0]
        }
    }
}